Two variable sized locking steel rings connected by a central chain. They were commonly used by pre-war police departments to aid in the apprehension and arrest of criminals. They cannot be equipped, and have no uses apart from being scrapped or sold.
- Found at various police stations across the Commonwealth.
- Nine at Med-Tek Research.
- Six at Cambridge Police Station.
- Four at Fort Strong.
- Two can be found in the house at the back of Covenant.